Materials Needed

textbook models of animal mitosis microscope slides of whitefish mitosis ( blastula) compound microscope

For Demonstration:

microscope slide of human chromosomes from leukocytes in mitosis oil immersion objective

The cell cycle consists of the series of changes a cell undergoes from the time it is formed until it reproduces. Interphase, mitosis, cytoplasmic division, and differentiation are stages of a cell cycle. Typically, a newly formed cell grows to a certain size and then divides to form two new cells (daughter cells). This reproductive process involves two major steps: (1) division of the cell's nuclear parts, which is called mitosis (karyokine-sis) and (2) division of the cell's cytoplasm (cytokinesis). Before the cell divides it must synthesize biochemi-cals and other contents. This period of preparation is called interphase. The extensive period of interphase is divided into three phases. The S phase when DNA synthesis occurs is between two gap phases (Gj and G2) when cell growth occurs and cytoplasmic organelles duplicate.

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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